Music AND Sound

2. a book forming part of a work or series.
5. = the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.
8. the rate at which something occurs or is repeated over a particular period of time or in a given sample.
10. known as Pythagoras of Samos. Pythagoras sought to interpret the entire physical world in terms of numbers, and founded their systematic and mystical study; he is best known for the theorem of the right-angled triangle.
12. a sequence of single notes that is musically satisfying.
13. a unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale.
14. instrument = a musical instrument in which sound is produced by the vibration of air, typically by the player blowing into the instrument.
15. general use) a degree of loudness.
16. two notes at the extremes of an octave sounding together.

1. the style of simultaneously combining a number of parts, each forming an individual melody and harmonizing with each other.
3. of the two notes at the extremes of an octave.
4. instrument a musical instrument that is sounded by being struck or scraped by a beater (including attached or enclosed beaters or rattles); struck, scraped or rubbed by hand; or struck against another similar instrument.
6. vocal or instrumental sounds (or both) combined in such a way as to produce beauty of form, harmony, and expression of emotion.
7. a series of eight notes occupying the interval between (and including) two notes, one having twice or half the frequency of vibration of the other.
9. a group of (typically three or more) notes sounded together, as a basis of harmony.
11. the SI unit of frequency, equal to one cycle per second.